Description
A flaw was found in nano. A local user could exploit a format string vulnerability in the `statusline()` function. By creating a directory with a name containing `printf` specifiers, the application attempts to display this name, leading to a segmentation fault (SEGV). This results in a Denial of Service (DoS) for the `nano` application.
Published: 2026-04-22
Score: 5.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Assess Impact
AI Analysis

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Remediation

Vendor Workaround

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Tracking

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History

Mon, 27 Apr 2026 20:45:00 +0000

Type Values Removed Values Added
First Time appeared Redhat nano
Redhat openshift Container Platform
Vendors & Products Redhat nano
Redhat openshift Container Platform

Wed, 22 Apr 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

threat_severity

Moderate


Wed, 22 Apr 2026 09:00:00 +0000

Type Values Removed Values Added
Description A flaw was found in nano. A local user could exploit a format string vulnerability in the `statusline()` function. By creating a directory with a name containing `printf` specifiers, the application attempts to display this name, leading to a segmentation fault (SEGV). This results in a Denial of Service (DoS) for the `nano` application.
Title Nano: nano: format string vulnerability leads to denial of service
First Time appeared Redhat
Redhat enterprise Linux
Redhat openshift
Weaknesses CWE-134
CPEs cpe:/a:redhat:openshift:4
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat openshift
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}


Subscriptions

Redhat Enterprise Linux Nano Openshift Openshift Container Platform
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-04-22T12:04:58.643Z

Reserved: 2026-04-22T07:23:19.148Z

Link: CVE-2026-6843

cve-icon Vulnrichment

Updated: 2026-04-22T12:04:53.758Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-22T09:16:26.963

Modified: 2026-04-22T21:23:52.620

Link: CVE-2026-6843

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-04-13T00:00:00Z

Links: CVE-2026-6843 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-27T20:21:08Z

Weaknesses